how to fix the P0133 oxygen sensor code in my Toyota Corolla E210 (2019-2024)?

Learn how to diagnose and fix P0133 oxygen sensor code in Toyota Corolla E210. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery to prevent electrical shock.

2. Remove the Oxygen Sensor

• Locate the upstream oxygen sensor (usually found in the exhaust manifold or near the catalytic converter).
• Use a socket wrench with an oxygen sensor socket to remove the old sensor. Turn counterclockwise to loosen it.
• Carefully disconnect the wiring harness from the sensor.

3. Inspect and Clean

• Inspect the sensor harness for any signs of wear or damage. Repair or replace as needed.
• Clean the threads in the exhaust manifold with a wire brush to ensure proper seating of the new sensor.

4. Install New Oxygen Sensor

• Apply anti-seize compound to the threads of the new oxygen sensor (avoid getting it on the sensor tip).
• Install the new oxygen sensor by threading it into the exhaust manifold and tightening it to the manufacturer's specifications (typically around 30 ft-lbs).
• Reconnect the wiring harness securely.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0133 code and any other stored codes.

6. Test Drive

• Start the engine and allow it to reach operating temperature.
• Monitor for the check engine light and confirm that the P0133 code does not reappear.